<s>
Spatial	B-Algorithm
embedding	I-Algorithm
is	O
one	O
of	O
feature	B-General_Concept
learning	I-General_Concept
techniques	O
used	O
in	O
spatial	O
analysis	O
where	O
points	O
,	O
lines	O
,	O
polygons	B-General_Concept
or	O
other	O
spatial	B-General_Concept
data	I-General_Concept
types	O
.	O
</s>
<s>
Geographic	B-General_Concept
data	I-General_Concept
can	O
take	O
many	O
forms	O
:	O
text	O
,	O
images	O
,	O
graphs	O
,	O
trajectories	O
,	O
polygons	B-General_Concept
.	O
</s>
<s>
Geolocated	B-Application
posts	O
on	O
social	O
media	O
can	O
be	O
used	O
to	O
acquire	O
a	O
library	O
of	O
documents	O
bound	O
to	O
a	O
given	O
place	O
that	O
can	O
be	O
later	O
transformed	O
to	O
embedded	O
vectors	O
using	O
word	B-General_Concept
embedding	I-General_Concept
techniques	O
.	O
</s>
<s>
Satellites	O
and	O
aircraft	O
collect	O
digital	O
spatial	B-General_Concept
data	I-General_Concept
acquired	O
from	O
remotely	B-Application
sensed	I-Application
images	O
which	O
can	O
be	O
used	O
in	O
machine	O
learning	O
.	O
</s>
<s>
They	O
are	O
sometimes	O
hard	O
to	O
analyse	O
using	O
basic	O
image	B-General_Concept
analysis	I-General_Concept
methods	O
and	O
convolutional	B-Architecture
neural	I-Architecture
networks	I-Architecture
can	O
be	O
used	O
to	O
acquire	O
an	O
embedding	O
of	O
images	O
bound	O
to	O
a	O
given	O
geographical	O
object	O
or	O
a	O
region	O
.	O
</s>
<s>
Both	O
types	O
are	O
represented	O
as	O
polygons	B-General_Concept
and	O
,	O
like	O
points	O
,	O
can	O
be	O
assigned	O
different	O
demographic	O
,	O
transportation	O
,	O
or	O
economic	O
features	O
.	O
</s>
<s>
A	O
polygon	B-General_Concept
can	O
also	O
have	O
features	O
related	O
to	O
the	O
size	O
of	O
the	O
area	O
or	O
shape	O
it	O
represents	O
.	O
</s>
<s>
alt	O
=	O
Map	O
of	O
San	O
Francisco	O
bay	O
with	O
19	O
blue	O
hexagons	O
plotted	O
on	O
top	O
of	O
it|center|thumb|Example	O
of	O
regular	O
hexagonal	O
tiling	O
used	O
to	O
divide	O
San	O
Francisco	O
Bay	O
area	O
using	O
Uber	B-Application
's	O
H3	O
library.alt	O
=	O
Map	O
of	O
San	O
Francisco	O
administrative	O
districts|center|thumb|Map	O
of	O
San	O
Francisco	O
administrative	O
districts	O
.	O
</s>
<s>
The	O
vertices	O
can	O
also	O
be	O
destination	O
points	O
like	O
public	O
transport	O
stops	O
or	O
important	O
points	O
in	O
the	O
city	O
,	O
and	O
the	O
edges	O
represent	O
the	O
flow	B-Operating_System
between	O
them	O
.	O
</s>
<s>
Embedding	B-Algorithm
graphs	I-Algorithm
or	O
single	O
vertices	O
allows	O
to	O
improve	O
accuracy	O
of	O
analysis	O
methods	O
in	O
which	O
the	O
treated	O
geographical	O
domain	O
can	O
be	O
represented	O
as	O
a	O
network	O
.	O
</s>
<s>
Shape	O
matching	O
-	O
finding	O
a	O
similar	O
shape	O
of	O
given	O
polygon	B-General_Concept
,	O
for	O
example	O
finding	O
building	O
with	O
the	O
same	O
shape	O
as	O
input	O
building	O
.	O
</s>
